Tuesday, 28 November 2006 hMailServer is a free, open source e-mail server for Microsoft Windows. All the common e-mail protocols such as IMAP, SMTP and POP3 are supported and it comes with an easy-to-use COM library that can be used for integration with other software. It also supports virtual domains, distribution lists, antivirus, antispam, aliases, distributed domains and much more. E-mail data is stored in a database server, MySQL or MS SQL.